Degrilleur Moisie Wastewater Treatment Plant, Sept-Îles, Québec

Degrilleur Moisie is a municipal wastewater treatment plant located in Sept-Îles, a city in the Côte-Nord region of Québec, Canada. The plant serves a small population of 470 residents and operates at a secondary treatment level, which is standard for small communities in Canada under federal and provincial regulations. As a secondary treatment facility, Degrilleur Moisie uses biological processes to remove organic matter and suspended solids, meeting typical Canadian wastewater standards. The plant's discharge volume is 721.50 m³/day, reflecting its small service area. Canadian wastewater plants are regulated under the Wastewater Systems Effluent Regulations (WSER) under the Fisheries Act, which set national effluent quality standards. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Gulf of St. Lawrence, a major marine ecosystem. The Gulf supports diverse aquatic life, including fish stocks and marine mammals, and is an important ecological and economic resource for the region. The proximity to the coast (within 10 km) means the discharge can influence coastal water quality.

The plant discharges into a watershed that flows into the Gulf of St. Lawrence, a large marine estuary connected to the Atlantic Ocean. The Gulf supports diverse aquatic life, including commercial fish species and marine mammals, and is an important migratory corridor for birds. The coastal location means treated effluent can affect nearshore water quality and local ecosystems.